Skiving-machine.



W. F. LAUTENSCHLAGER.

SKIVING MACHINE.

APPLICATION FILED MAR. 9. 1'914.

Patented Jan.2,1917.

I /A/I/E/I/Ta' ATT'V.

TED

WILLIAM E. LAUTENSCHLAGEE, 0E CINCINNATI, OHIO, AssIGNoR ro LORENZ MU'IHER,

" 0E NEWTON, MASSACHUSETTS.

SKI'VING-MACHIN E.

To all whom it may concern:

Be it known that I, WILLIAM F. LAU'IEN- *soHLAGEa a citizen 0fthe United States residing in Cincinnati, county of Hamilton, State-of Ohio, have invented certain new and useful Improvements in 'Skiving-Machines, of which the following is a specification, reference being had to the ydrawings accompanying the same and forming a part thereof. A

My invention relates to improvements in skiving machines of that class wherein a rotating cutting knife is employed, together with a feed-wheel or roll for supporting and feeding the materialvwhile it is l'being skived.

i The objects of my invention are to so construct the feed-wheel or roll that it will automatically accommodate itself to varying thicknesses of material and present the material to the rotating cutter at any desired angle.V Y A A further object of my, invention is to provide adjustable spring-controlled means for normally retaining the feedewheel vor roll with its axis in linerwith the axis of its rotation, together vwith means for rigidly retainingthe feed-'wheel or `roll with its axis in line with its axis'of rotation when it is found desirable so to do.

My improved'feed-wheel or roll may b applied to any skiving machine wherein there is employed a rotating cutter. It is shownL as applied to the skiving machine illustrated inLetters Patent of the United States No. 1,091,753, of March 31, 1914.

In the drawings Figure 1 is a front elevation of a section of a skiving machine wherein my improved feed-wheel or roll is embodied;` Fig. 2. is a sectional side elevation of my improved feed-wheel or Vroll illustrating it with its axis held in line with its axial or rotation by a yielding spring and an adjusting nut; Fig. 3 is an enlarged sectional side elevation of my .improved feedwheel or roll, illustrating it asit would appear with its axis deflectedrto an angleto its axis-of rotation; Fig. 4 is an elevation taken through line 4 4, Fig.v 1, viewed from the right hand end.

In the drawings, 1 'represents the shaft of a skiving machine upon `which the disk 2 is rigidly mounted and secured against rotation bya binding-screw 3. This shaft 1 is provided with a hole 4 in its end, ar-

Specication of Letters Patent.

' f shaft 1.

Patented J an. 2, 1917'.

Application ined March 9,1914. sria1No.s23,274.

rangedl to receive the pinl 5 which is secured in the inner end of the bearing 6, the bearing 6 being provided witha projecting rim or head 7, somewhat thinner than the space 8 in' t-he disk 2 in which the head 7 -is mounted.y The edges 9, 9, of the projecting head 7 have a curvature conformingto a circle developed from a point located at the axis of the bearing 6 so that when itsaxis is at an angle to the axis of the,l shaft 1,

as shown in Fig.V 3, the head 7 will exactly j fill the bore in the disk 2. The outerv end of the bearing 6 is threaded to receive the adjusting nut 10, the kthreads extending in far enough so that the adjusting nut 10 may be turned inwardly. to contact with the Collar 11 and vforce its inner end against the disk 12, pressing the disk 12 against the disks13, 13, 13, 13, and they in turn against the face 14 of the disk 2, but with the inner face 15 of the projecting head 10 drawn tightly against the surface 16 of the space 8 in the disk 2. This rigidly binds the disks 12 and,13, and thebearing 6, against the disk 2 and rigidly holds all said parts so that their axes are in a right line with the axis ofthe shaft 1.

The disk 2 has secured to it the pin 17 18, etc., inthe disks 13 and the disk 12. The purpose of the pin 17 is to drive the disks 12 and 13,-or rotate them'ffrom the The holes 18 are considerably larger than the diameter of the pin 17 so that the disks may be deflected so their axes will be inclined to an angle with the axis Yof the shaft 1, as shown in Fig. 3, the purpose of which will be more fully described hereinafter. f

There is a spiral spring 19 surrounding the collar 11, its outer end bearing against the adjusting nut 10 and its inner end against the outer face of the disk 12. The purpose of the spring 19is to normally hold the bearing 6 and the disks 12 and 13, etc., with their axes in alinement with their axes of rotation, or in a right line with the axis of the shaft l1 through the tension of the spring exerted against the inner face of the clamping nut10 and the outery face of the disk 12, pushing the disk 12 and the disks 13, etc., against the face of the disk 2, and drawing the surface 15 of the head 7 against the surface 16 of the contracted por- -tion of the hole or space 8. The tension ,which projects outwardly and into holes 18,

Vbearing 6.

In skiving leather forfshoe uppers, vam'ps,

etc., where it is ofsomewhat uneven thick-Q v ness; e., where the different uppers and Vamps vary from cache other -in thickness,

and where differentportions cfa vamp or upper vary in thicknessVit is desirable when skivingthe edgelto vary the slope or angle at Vwhich the strip skived off is cut, according as the material `varies in thickness. To

skive the material properly, it is desirable to keep the edge Vof the material at a uniform thickness and not run the skiving cut back Vtoo far upon the body of the material.

. 'lo attain this object it hasheretofore been necessary to change the angle `at which the rotating' cutter stands with relation 'tof the supporting surface of the feed-Wheel or roll,

` which-,change isnot desirahlebecauseof the Y necessity .of stoppingthe machine to do it properly and the consequent time it takes to. makesuch change. Another. way of meeting the difficulties arising from varying thicknesses of the material being skived .is Ito,` provide for varying the angle of the supportingwheel as a whole, but.-such form vof adjustment has been found undesirable for the reason that" it tends to vary :the thickness of the edgeof the material after it is skived.'l Invmy improved device I 'employ a feed-wheel .or rollma'de up of a plu- `ralityof disks mountedfupon a bearing and so arranged that the several disks maybe deflected to varying kdegrees from nothing at thesupporting disk to the full desired amount of the deflection at .the outermost disk, asis illust-rated in Fig; 3.

In-vEig.x.1:there is illustrated a gage 20 againstcwhich'the edge kof the material to be skivedisguided, and-which gage determines fthewidth of. skive, the gage vhaving an extending portion 21 extending o-ver the feed-.wheelmade up of. the disks 12 and 13, serving to .hold. thev material down in place at the point Vwhere the skiving cut takes place. In conjunction with the guide 21 I-provide a rotating feed-wheel 22 which bears upon the leather and holds it against the flange 23 ofthe disk 12.

In practice, the feed-disk-22 is mounted uponthe shaft 24 and is rotated thereby,

. the shaft 24 having an adjusting collar- 25 adjustably secured ;to it by the .bindingscrew 267s@ thatfthe upward movement of' they feed-disk 22 canl bel limited and itslower surface isset a distance apart `from ythe flange 23 approximately equal toy thethin- -nest piece of. leather which isto beV skived; then if the adjusting nut 10v is adjusted outwardly as Vshown in Fig. 2, so as toleave space'` between it ,and the collar 11, the .disks 12 and 13 and the pivot 6 are held in alinement bythe tension of the spring 19, the i i 23 and the lower side of the feed-disk 22.

'Vhenever a thick spot in the leather comes between the disk 22 andthe flangeY 23 the disks" 12 and 13 will be deflected downward an amount equalito the increase'in thickness, assuming the position shown in Fig. 3, and as the thick partv of the vleather passes through and the'thin part. is reached,..the spring 1 9 gradually causesthe disks to approach their normal position with their axes in line, or more Anearly in line with thevaXis of rotation of the feed-wheelV and shaft V1;

It is thus seenirthat thefeed-roll automatically ,accommodates :itself through the tension of the spring-.19m the varying thicknesses of material passing between the feeddisk 22 and the Harige 23of-.thefeed-wheel.

l It will be noted that the innermost of the i' disks 13, z".fe.,the one that liesl againstvthe disk- 2 is deflected yVeryrslightly, as shown in`Fig. 3,' and the aXiSbf/each succeeding disk, including the outer one 12, stands at azgreater `angleof deflection, the angle 1depending on the thickness of the-'material passing between'the fiange23 andthe feeddisk 22, so that thevariation of thicknes'sat H the edge of the materialafter the Vs'kiving cut has taken place is not appreciable', but thevariation inthe angle-of cutmay be quite considerable in a pieceof material eXtra thick, theangle varyingas, the maj terial passes vthrough from the thickest part tothat portionhaving ,a normal thickness.

Villiers the material runs 'uniform in thickness the adjusting nut `10 may be screwed inwardly to bindthe vcollar 11 and, the disks ,12 and 13 firmlyagainst the disk 2 and prei@ vent Lany., defiection. s Y `When the machine is used for skiving heavy materiaksuch as heavy calf, the feeddisk 22, as statedbefore, is adjusted so thatY its kupward movement may -rbe ,limitedV by meansxof the collar 25j to the. thinnestpiece ofmaterial. Whenmthe skiving machine is kused for .skiving very thin material, like vici kid, another adjustment ofthe feeddis'k l22fis requiredgc'. e., the collar 25 is so adjusted on. the yshaft '24 'that the thinnest piece of .vicikid Will pass betweenl its end surface and the flange 23 withoutdeflection ofthe feed-wheeh the spring 19permitting such deflection f as will accommodate the-A varying thicknesses of the different pieces of vici kid and the varying :thicknesses in eachindividual piece.

I do not wish to confine in, or the manner-in which the feeding wheel exact .form of the parts as'illustrated 'here or -roll is mounted on theskiving machine,

as lathe form 'and Vmethod. lof mounting may be varied withoutV departing from the spirit.

of my invention.

What I claim is- 1. In a skiving machine, the combination With a cutting knife of a feed-Wheel for feeding and supporting the material, Which feed-Wheel consists of a disk mounted on a rotatable shaft, said rotatable shaft, a rotatable bearing movably mounted in said disk, a plurality of rotatable disks yieldingly mounted on said rotatable bearing, a spring for normally retaining said rotatable bear-v ing in alinement with the rotatable shaft, and an adjusting nut for adjusting the tension of said spring.

2. A feed-Wheel for skiving machines, comprising a disk having a fixed axis of rotation mounted on a rotatable shaft, said rotatable shaft, a rotatable bearing having one of its ends mounted in said disk in such manner that its axis of rotation may be varied With relation to the axis of rotation of said rotatable shaft, a plurality of disks yieldingly mounted on said bearing, means for causing said plurality of disks to rotate with the disk having the fixed axis of Copies of this patent may be obtained for rotation, spring-controlled means for normally holding said plurality of rotatable disks with their axes of rotation in alinement With the axis of rotation of the rotatable shaft, and means for varying the tension of said spring.

3. A feed-Wheel for skiving machines for supporting and feeding the material, consisting of a plurality of rotatable disks, and yielding means to permit the axes of rotation of a plurality of said disks to be automatically varied with relation to the eutting plane of a cutting knife, and means that may be adjusted to rigidly hold said disks With their axes of rotation in alinement with each other.

In testimony whereof, I have hereunto set my hand, in the presence of tWo subscribing Witnesses, this the 7th day of March, A. D. 1914.-.

WILLIAM F. LAUTENSCHLAGER, Witnesses:

L. MU'rHER, H. M. Knnso.

five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

